Pump or engine



May 14, 1935- v s. B. BROWN 2,001,011

PUMP OR ENGINE Filed NOV. 19, 1932 FIGLI. 12"Z\4 32 I c 30 24 lg 623 51, 60 s 31 Zgwx ZL INVENTOR.

19 1 l M4-0m Z4 A TTORN E YS.

Patented May 14, 1935 I y vUNITED STAB-S PAT 2,001,011

` r on ENGINE Samuel Barton Brown, Los Angeles, Calif.

Application November 19, 1932, Serial No. 643,382

2 Claims. (Cl. 10S-144) This invention relates to pumps or engines I8 is adapted to turn, as presently will appear, and more particularly to a device which may be and rear section I3 is provided with a second exorricfe used as either a pump or an engine. ternal flange I 3c against which end plate I4 is The primary object of this invention is to proheld by Cap SCleWS 20 the ends 0f which are 5 vide a pump and engine of the rotary type which seated in said flange |30- 5 may be used as a blower or as a pump for pump- Middle section I I, of the casing, is formed of a ing uids of all kinds, gaseous or liquid, and cylindrical metal ring 2l, Of relatively large d- Which may be used equally well as an engine ameter, having comparatively thCk 'Wa-11S 2|@ adapted to be driven by steam or any kind of gas and heavs7 external 'anges 2Ib at each end lo or liquid which is under suitable pressure. thereof and a wide metal band 22, i-ltting close- 10 A further object is to provide a pump and enly between flanges I2b and l3b, said band gine of the character described which is simple being clamped against anges 2lb, by bolts in construction, durable, and exceptionally ef- 23 which extend through lugs 24 xed adjacent cient in its operation. the ends of the band. An annular space 25 is l5 Other objects will appear hereinafter as the thus formed between said band 22 and wall 2in, 15 details of the invention are described. -or ring'2l. Two vpipe fixtures 26 and 2l, equalf Referring to the accompanying drawing which ly spaced form a .vertical plane through the axis illustrates what is at present deemed to be a of the casing, are attached to band 22 and suitpreferred embodiment of `the invention, able openings Ma are made therein to permit -Fig l is a longitudinal sectional view taken communication between said pipe fixtures and 20 approximately in a Vertical planegthrough the annular` space 25. 1 axis of the device, as on line i-l of Figs. 2 A tightly fitting block 28 is fixed in middle and 3l section il, midway between pipe ixtures 26 and Fig. 2 is a transverse sectional view of the 2, so as to obstruct direct communication .25 hump and engine shown in Fig. 1, taken on line therebetween through annular space 25. Simi- 2 2 of Fig. 1. lar but movable obstruction blocks 29 and l,

Fig. 3 is a reduced endview of the device, as adapted to be held in adjusted positions by Ina- Seen When lkilg in the direction indicated by chine bolts el which are movable in slots 22h arrow l in Fig. l. "i, cut in band 22, are mounted in annular space 25 3o Fig- 4 is a fragmental sectional view taken in spaced relation to block 28 and in diamet- 30 on line @-i of Fig. l. rically opposite positions from each other. As clearly shown in Figs. l and 2, the pump Closure plates 32 adapted to .keep slots 22h and engine, comprises an outer shell or casing closed, are tted under the heads or bolts 3l. mi mail@ 11D 0f a Cylindrical middle Section ll, Two separate portions of annular space 25 35 a front end section l2, and a rear end section i3 are thus cut oil' to form chambers 25a and 25h 35 hal/img all end plate It attached thereto, and E which communicate with pipe fixtures 2B and an inner .rotary member le made up of a Cylin- 2l respectively. A series of parallel slots 33 are drical section it, of considerably smaller diamecut through that portion of wall Zia Which is ter than of section II of the casing, and a front coextensive with chamber 25a and another series. o end section il having a, shaft i8 extending from of similar slots 34 are cut through that part of 40 the center thereof which is made integral thele- Wall 2Ia which is coextensive with chamber 25h with. End Sections l2 and f3 0f the Casing have thus forming a, path 0f communication from one cylindrical portions @2a and l3a respectively, chamber to the other through the interior of Whose common axis is in offset relation to the middle Section, H of the casing axis of'middle section II. The internal diame- Cylindrical Section I5 of rotor l5 is provided 45 ter of Said cylindrical portiqns '2a and 3a cor'. with internal flanges I6a and l6b on its front res-ponds to the external dlameter of rotor 5* and rear ends, respectively, and with a series of :i: i322 of varying width, between which middle secends telmmate m s ald flanges '6a and '6b' 50 tion II is. clamped by bolts, studs or cap screws Dlametllally opposite slots. .35 and* 36 are W9 extending throughthem are formed on the formed longitudinally 1n bearmgs I6c 1n planes -Mggcylindrical portions I 2a, and I3a respectively, of radiating from the \center of the rotor. The

end sectiis 'I'and I3. Front section I2 is proend section I'I of rotor I5 isheld rigidly atvided with a bearing flange I2c inl which shaft tached to the cylindrical section IB thereof by 5 central boss I4a formed on rear plate I4, so as to project within the rear end of rotor I5, and the turning ring 38D being clamped between flange I6b of the rotor and a ring 40 held in contact therewith by cap screws 4I. Fixed ring Sais held securely seated on boss I4a by a circular plate 42 which is held in place by a stud bolt 43.

Fixed ring 39a of the roller bearing is held seated in flange I2c of' the casing by an extension ring 44 butting against flange I2c and in a clamping ring 45 fitting within flange I2c. A retaining washer or shim 46 is placed between clamping ring 45 and bearing ring 39a and these several parts are held in place by machine bolts 41, the ends ofv which screw into clamping ring 45. Turning ring 39D of the roller bearing is held on shaft I8 against a spacing sleeve 48, which is slipped on the shaft, by a clamping nut 49 working on a threaded portion of the shaft.y

Portions of both `extension ring 44 and clamping ring 45 are bored out so as to form suitable yseats for packing rings 5I) and 5I.

I middle section of the casing and to the eccentric position of the former in the latter, the space between the former and the inner Wall of the latter is not of uniform depth. While the upper side of the rotor is in actual contact with the inner wall of the casing. as shown, there is a space S between them which increases uniformly from the upper part to the lower part of the casing.

A tubular shaft 52 extending through plate 42 and boss Ila is fixed in end plate I4 of casing I0 so that its axis coincides with the axis of the middle section II of the casing and its free end projects forwardly within rotor I5, a distance approximately coextensve with the cylindrical section I6 thereof. A circular plate 53 is held in contact with the free end of tubular shaft 52 by a stud bolt 54 which extends axially through tubular shaft 52 and has a large washer 55 on its outer end which contacts with the outer face of plate I4. A turnable sleeve 55, having a flange 56a on one end in contact with plate 53 and its other end butting against plate 42, is slipped on tubular shaft 52 and a spacing washer 51 is fitted tightly on this other end of the sleeve. Two relatively large and heavy discs 58 and 59, one in contact with flange 56a and the other with washer 51, are fixed on sleeve 56 so as tov turn therewith.

A series of equally-spaced straight blades 60a, 50h, 50c, 60d and 60e extending radially within middle section II of the casing and having their outer ends in contact with the inner wall 2Ia thereof, pass through slots 35 and 36 of bearings I 6c and also through suitably slotted pins 6I which are'adapted to turn in said bearings I6c. The dimensions of the slots in pins 6I correspond closely to the width and thickness of the blades which passthrough them but they are suillciently large to permit free longitudinal movement of the blades therein. As shown in Fig. .2 slots 35 and 36 are made wide enough t0 provide ample clearance for the blades in whatever position they may be with reference to rotor I5.

It should be understood that the width of the blades is such as to span the space S in the lower part of the casing and at the same time to permittheir movement therein without undue friction. One of the blades, 60a as here shown is made slightly wider on its inner end and is welded or otherwise rigidly secured to discs 58 and 59. The inner ends of the other blades 60h, 60e and 60d and 60e are held in place by heart-shaped discs B2b, 52e, 62d and 62e having deep notches cut therein, as shown 'in Fig. 2, in which the blade ends are seated.

These heart-shaped discs are fixed, in suitably spaced pairs to accommodate the different blades, on sleeve 56.

From the construction shown and described it is evident that when either the rotor or the blade assembly which forms a floating vane structure, is caused to rotate in either direction it will cause the other to rotate therewith. For instance, if power is applied to shaft I8 so as to cause rotor I5 to turn in the direction indicated by the arrow in Fig.l 2, the blade assembly will be driven in the same direction and the outer ends of the several blades will sweep through space S thus causing fluid to be drawn into thecasing pipe fixture 21 and slots 34 and to be driven out again through slots 33 and pipe fixture 26. This is the action which takes place when the device is usedas a blower or a pump. On the other hand if the device is to be used as an engine suitable connections are made to shaft I8 and steam, gas or liquid under suitable pressure is admitted into pipe fixture 21. lThe pressure exerted thereby on the several blades as it travels through space S on its way through the device, obviously, will cause the blade assembly to rotate and drive the rotor and shaft including blade a rotate as a unit on spindle' 52. The remaining four blades 50h, 60e, 50d and 50e rotate with bushing 56 but are free to os-Y cillate relatively back and forth in angular relation to each other. When saidv blades are at the top of the pump or engine they are angularly closer together than when at the bottom. The blades 60a, 60h, 60e, 80d and 80e are arranged to rotate with thebushing 55 to balance the wear due to centrifugal force oni spindle 52 and also to minimize the wear between bushing 56 .and parts B2b, 52c, 62d and 62e. The xedrelation of the blade 58 to the remainder of the rotating structure strengthens and stabilizes the operating parts.

The inner ends of blades 60h, 69e, 60d and 50e are widened out to touch circular pieces 58 and 59 which in turn are restricted end ways with bushing 55a and 51 ends, to restrict the endwise movement of the blades and give proper clearance between them and the crescent shaped walls of core parts I2b and |31).

The blades a, 60h, 60e, 60d and 60e are arranged to rotate on the spindle 52 through bushing 56 but restricted from touching the inner -surface of the case 2da., said blades being fitted to prevent leakage with a slight running clearance, but not actually touching to prevent undue friction and wear at this point.

When used as a pump or blower the rotor turns clockwise (see arrow) so as to draw in uid through parts 34, at receiver pressure. The uid or gas is then Acompressed between' the rotor and case between said blades before being ejected through ports 33 to receive pressure. By varying the angular exit openings at 33 to suit the receiver pressure a reversal of flow of the fluid or gas through these ports 33 can be diminished or entirely prevented.

When used as a motor, the rotor turns anticlockwis'e and by'varying the angular openings of 33 the cut-01T can be regulated so as to take advantage of the expansion of gases traveling therethrough.

Fig. 4 illustrates more clearly one of the seats or recesses Gla formed between one of the pins 6l and the front end section il of the rotor. The recesses 6ta. aid in shutting off pressure leakage from chamber S through the annular recess Ila: to the center Vportion of the -rotor assembly. The lip portion We which surrounds the annular recess Hx, and which has in it the curved seats 6 la, is sufficiently thick to compensate for the formation of said seats therein.

The depth of eachseat 64a is considerably lessthan its width. As indicated by the sectional.

view (Fig. 4) taken on line -l of the lower portion of Fig. l, the recesses which form these seats are located near one side of the'end section Il of the rotatable member and in a plane at which it is necessary to supply some special means Where the running t occurs to prevent pressureleakage from the crescent-shaped chamber S to the space within the rotor assembly.

Owing to the fact that the lip ilzis imperforate opposite to each shallow concavity or seat 6 la leakage is prevented where the running fit occurs. Said concavities may be quickly and easily made by the use of a suitable rotary cutter.

The curved seats Ela extend over relatively small segments ofthe end portions o f the pins 6| and constitute parts of the bearing surfaces' and leak preventing means for the parts of the pins opposite to them. The result of this con-i struction is that the bearing surfaces of said the rotor which is attached by the cap screws 31 to the cylindrical section I6 thereof. 'I'herefore when long use causes said seats to become worn, the motor section Il can be removed and replaced with an unworn -part without discarding the entire structure of the rotor.

I claim: 1. In a rotary pump or' engine of the type described, in combination, a casing; and a rotor .mounted therein having an end section which is provided with an annular recess in the innerface thereof adjacent to its periphery, said rotor section being detachably secured to the remainder of the rotor and having a lip which surrounds said recess, there being a surface exterior to said lip Wit-.h which it has a running t and a series of curved seats formed in the inner side of said lip, said lip being imperforate opposite the outer sides of said seats to prevent leakage, a spindle, a plurality vof rotor blades mounted upon said spindle, pins through which said rotor blades extend, and a cylindrical rotor section upon which ,said pins are mounted With a fluid-tight working t, end portions of said pins being seated upon said curved seats to prevent leakage between the external and internal chambers of the structure, there being --other bearing portions for said pins to cooperate with said curved seats, said other bearing portions being formed in the part of therrotor to which the aforementioned end section is detachably secured.

2. In a rotary pump or engine of the type described, in combination, a casing; -and a rotor mounted therein having an end section which is provided with an annular recess in the inner face thereof adjacent toits periphery, said rotor section being detachably secured to the remainder of the rotor and having a lip which surrounds said recess, there being a surface exterior to said lip with which it has a running t and a series of curved seats formed in the inner side of said lip, there being an imperforate portion "of said lip opposite the outer side of each seat to prevent leakage, the depths of said seats being considerably less than their widths thereby providing shallow concavities, a spindle, a plurality of rotor blades mounted upon said spindle, pins through which said rotor blades extend, and a cylindrical rotor section upon which said pins are mounted with a fluid-tight working fit, end portions of said pins being seated upon said curved seats to prevent leakage between the external and internal chambers' of the structure, there being other bearing portions for said pins to cooperate with said curved seats, said other bearing portions being formed in the part of the rotor to which the aforementioned end section is detachably secured.

SAMUEL BARTON BROWN. 

